| Alexandru Nilca | |
| Birth Name: | Sándor Nyilka[1] |
| Birth Date: | 6 November 1945 |
| Birth Place: | Târgu Mureş, Romania[2] |
| Height: | 180 cm |
| Weight: | 74 kg |
| Sport: | Fencing |
| Event: | Sabre |
| Club: | Tg. Mures CSA Steaua București[3] |
| Coach: | Andrei Kakucs Ladislau Rohonyi Dumitru Mustaţă |
| Show-Medals: | yes |
Alexandru Nilca (Hungarian: Sándor Nyilka; born 6 November 1945) is a retired Romanian (ethnic Hungarian)[1] sabre fencer. He competed at the 1976 and 1980 Olympics and won a team bronze medal in 1976, placing fifth in 1980. He won two team silver medals at the world championships in 1974 and 1977.[3]